Physics - November 2007

2007-11-08 10:55:06 · 3 answers · asked by Anonymous

Hi, guys I really need your helps for doing this homework. I have to do 10 pages of physics research paper for my physics class. But I really can't find anything. It's due in 1 day. So, I want to know where can i find 10 pages of physics research paper? please HELP ME........

2007-11-08 10:45:21 · 5 answers · asked by raj 1

A runaway truck lane heads uphill at 21 to the horizontal. If a 1.9×104 truck goes out of control and enters the lane going 120 , how far along the ramp does it go? Neglect friction.

Thanks in advance

2007-11-08 10:36:17 · 1 answers · asked by Need help plz!!! 1

Two polarizers are oriented at 32o to each other and a polarized light is incident on them. If only 28 percent of the light gets through both of them, what is the angle between the initial polarization direction of the incident light and the first polarizer? the answer is in degrees

2007-11-08 10:24:39 · 1 answers · asked by Anonymous

A penny rides on top of a piston as it undergoes vertical simple harmonic motion with an amplitude of 4.0 cm. If the frequency is low, the penny rides up and down without difficulty. If the frequency is steadily increased, there comes a point at which the penny leaves the surface. What is the maximum frequency for which the penny just barely remains in place for the full cycle in Hz?

2007-11-08 10:24:38 · 1 answers · asked by gbutterfly339 1

Sometimes you cannot recieve the signals very well like if you are in a basement or something. Why? What is the reason for this?

2007-11-08 10:08:37 · 3 answers · asked by Power of m squared 2

A car company puts a 50 horsepower engine in a car. at a test run, they run the car for 8 seconds. if the car started from rest, what is the final velocity? i cannot figure out what formula to use

2007-11-08 10:08:01 · 2 answers · asked by chris r 1

2007-11-08 09:41:54 · 11 answers · asked by Ahwell 7

Every surface is frictionless in this problem.
A block of mass M is rolling on a frictionless plane (it is on wheels that have no mass). A horizontal force (F) is acting on it. On the top of block of mass M is a smaller block with mass M1. There another block with mass M2 (same as M1) is hanging off the front of block with mass M. It is being held up with a string that goes over a pully and is attached to block with mass M1.
What horizontal force, F, would be needed be applied to block of mass M to have the system of block M1 and M2 have an acceleration of 0?

2007-11-08 09:16:03 · 1 answers · asked by IAmClifford 2

I was wondering the avarage speed that is needed to sail a hobie wave. The wight of these catamarans is aproximately 245lbs / 111 kg. Length 13'0"/ 3.96m; Beam 7' / 2.13m; Mast length 20' / 6.09m

2007-11-08 09:07:55 · 2 answers · asked by Tito K 1

Object 1 has a mass m1 and a velocity 1 = (2.65 m/s). Object 2 has a mass m2 and a velocity 2 = (3.19 m/s). The total momentum of these two objects has a magnitude of 18.2 kg·m/s and points in a direction 66.5° above the positive x-axis. Find m1 and m2.

(a) m1_?_kg

(a) m2_?_kg





Thanks for your time!!!

2007-11-08 09:06:02 · 1 answers · asked by PaNaSoNiCeDgE 1

There are 2 blocks. One with large mass (M) and the other with lighter mass (m). The two block are next to eachother on a frictionless, flat plane. A very small bug (assume no mass) sits in between the two blocks.
In which case would the bug inbetween the blocks be less likely to be squished (recieve the least amount of force)?
1.) A horizontal force, F, pushes the block mass M into block mass m.
2.) A horizontal force, F (same force as in question 1), pushes the block mass m into block mass M.

Explain how you got plz. Thanx!

2007-11-08 09:04:12 · 1 answers · asked by IAmClifford 2

A simple pendulum, consists of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not stretch. In the absence of air friction, the system oscillates by swinging back and forth in a vertical plane. If the string is 1.60 m long and makes an initial angle of 34.5° with the vertical, calculate the speed of the particle at the following positions.
(a) at the lowest point in its trajectory
m/s
(b) when the angle is 15.0°
m/s

2007-11-08 08:57:32 · 3 answers · asked by tuerving 2

"the earth orbits the sun once per year at the distance of 1.50x10^11m. venus orbits the sun at a distance of 1.08x10^11m. these distances are between the centres of the planet and the sun. how long (in earth days) foes it take for venus to make one orbit arounf the sun?" (please can you work this out using equations not jus searching the answer in google etc. thank you) thnx for your help

2007-11-08 08:42:29 · 2 answers · asked by dilo247 1

A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 3.00 cm. What is the oscillation frequency of the two-block system?

2007-11-08 08:39:27 · 1 answers · asked by rochesmk 2

Assuming a space ship designed in a circular fashion with a diameter equal to one kilometer. If the ship has a translational motion and a circular motion in space making one revolution around itself in a minute (1rpm). The outward surface would be traveling at Dpi every minute or 3.14 kilometers/min or (52 m/s.) Now if we extend the radius of the space ship 1000 times making the diameter to be 1000 kilometers, then the outward surface of the ship would travel 52 kilometers/second.

If the need arose as we progress in our technology through the years assuming that nuclear energy is used to power the ship and at a certain stage we decided to enlarge that ship's diameter 10,000 times its previous dimensions. At this point we would have the outward surface travel at a speed = 520,000 k/s, while the speed at 500 meters from the center of the ship travels only at 52 m/s. what are the possibilities to extend that outward surface to make it travels beyond the speed of light? And what would prevent us to make the ship rotates at that speed?

2007-11-08 08:38:05 · 1 answers · asked by lonelyspirit 5

An 0.8-kg object is attached to one end of a spring and the system is set into simple harmonic motion. Please take the values of A and T as: A = 0.091 m and T = 1 s. If the amplitude, A, of the motion is .091m, and angular frequency omega is 6.283 rad/s and the spring constant is 31.582, then
a) Find the speed of the object at t=3s
b) Find the magnitude of the objects acceleration at t=3s

2007-11-08 07:50:21 · 1 answers · asked by Jerry M 1

An 8.0-kg hanging block is connected by a string over a pulley to a 6.5-kg block sliding on a flat table (Fig.P5.47). If the coefficient of sliding friction is 0.28, find the tension in the string.

2007-11-08 07:46:47 · 1 answers · asked by Imad Syed S 1

A rope is stretched between supports 15 m apart. Its tension is 35 N. If one end of the rope is tweaked, the resulting disturbance reaches the other end 0.48 s later. What is the total mass of the rope?

2007-11-08 07:37:43 · 1 answers · asked by katherine g 2

So far I know this type of collision is somewhat inelastic. But, I'm not sure what equation I should use to approach this problem. Please help!

Collision between two pucks on an air-hockey table.
Puck A has a mass of 3.1 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 7.1 kg and is initially at rest. After the collision, the two pucks fly apart with the angles: Puck A= 65 degrees, Puck B= 37 degrees.

(a) Find the final speed of:
puck A=
puck B=

(b) Find the kinetic energy of the A+B system:
before the collision=
after the collision=

2007-11-08 07:21:18 · 1 answers · asked by =P 6

A violin string is 36.0 long. It sounds the musical note A (440 Hz) when played without fingering.
How far from the end of the string should you place your finger to play the note C (523 Hz)?

Any help on how to approach this question would be appreciated. Thank you

2007-11-08 06:35:24 · 4 answers · asked by 킹세븐 2

Light of wavelength 598 nm illuminates a single 0.77 mm wide slit. At what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 2.03 mm from the central maximum?

What is the width of the central maximum?

im not sure where to start

2007-11-08 06:14:13 · 1 answers · asked by Pac M 1

I've gotta find out what type of electromagnets and radiation are transmitted by the atmosphere and what are absorbed.
I've tried a lot of internet sites, but I can't find one that breaks it down into something simple enough so that i can understand it fairly easily. I can't spend all night on it, which is why I don't want to go too deep into it, but I'm hoping it's a fairly straightforward answer.

2007-11-08 06:06:51 · 1 answers · asked by Anonymous

A diffraction grating with 230 lines per mm is used in an experiment to study the visible spectrum of a gas discharge tube. At what angle from the beam axis will the first order peak occur if the tube emits light with wavelength of 686.2 nm?

At what angle will the second order peak occur?

i used the sin theta = wavelength/distance eqn and i got .00904 for the first one and .0181 for the second one and i got both of them wrong any suggestions?

2007-11-08 05:56:33 · 2 answers · asked by meeh 1

wavelength = 632.8 [nm] how do i convert this to millimeters??

2007-11-08 05:51:33 · 3 answers · asked by Anonymous

A satellite orbits Saturn at twice the distance of the Moon from the Earth. Its period is 8 days .Many times more massive than the Earth is Saturn?

2007-11-08 05:31:03 · 2 answers · asked by la_belle_creole_2000 1

A planet orbits a star at a distance of 40 AU and has an orbital period of 80 years, what is the mass of the star ( express in solar masses)

2007-11-08 05:18:56 · 2 answers · asked by la_belle_creole_2000 1

An 0.8-kg object is attached to one end of a spring and the system is set into simple harmonic motion. Please take the values of A and T as: A = 0.091 m and T = 1 s. If the amplitude, A, of the motion is .091m, and angular frequency omega is 6.283 rad/s and the spring constant is 31.582, then
a) Find the speed of the object at t=3s
b) Find the magnitude of the objects acceleration at t=3s

2007-11-08 05:01:39 · 1 answers · asked by Anonymous

When a nuke explodes it releases extremely large amounts of energy, how far does this energy (how far is the destruction) expand past ground zero, and how far does the radiation carry from ground zero as well. I know the whole world feels this energy in some small way, but how far does the destruction carry.

2007-11-08 04:15:29 · 6 answers · asked by Anonymous

http://news.bbc.co.uk/2/hi/science/nature/6589157.stm

Absolutely fascinating article - I note that the world has 5 times the mass of Earth and has 1.4 times the diameter. I admit we do not know its exact chemical make-up but if we assume it is similar to Earth can someone please tell me how much higher the gravity would be.

Please show your working!

2007-11-08 03:42:25 · 2 answers · asked by Leviathan 6